1. Hudson, H., J. Phys.: Conf. Ser., 2015, vol. 632, no. 1, p. 012058.
2. Miroshnichenko, L.I., Vashenyuk, E.V., and Pérez-Peraza, J.A., Geomagn. Aeron. (Engl. Transl.), 2013, vol. 53, no. 5, p. 541.
3. Miroshnichenko, L.I., Geomagn. Aeron., 1994, vol. 34, no. 4, p. 29.
4. Miroshnichenko, L.I., Radiat. Meas., 1996, vol. 26, no. 3, p. 421.
5. Struminskii, A.B., in Trudy XIX Pulkovskoi konferentsii po fizike Solntsa “Solnechnaya i solnechno-zemnaya fizika” (Proc. XIX Pulkovo Conf. on Solar Physics “Solar and Solar–Terrestrial Physics”), Pulkovo, 2015, p. 343.